BROWSE

Related Researcher

Author's Photo

Oh, Jae Eun
Nano-AIMS 구조재료 연구실
Research Interests
  • Concrete Materials, Construction Materials, Cementless Binders

ITEM VIEW & DOWNLOAD

Determination of the bulk modulus of hydroxycancrinite, a possible zeolitic precursor in geopolymers, by high-pressure synchrotron X-ray diffraction

Cited 7 times inthomson ciCited 0 times inthomson ci
Title
Determination of the bulk modulus of hydroxycancrinite, a possible zeolitic precursor in geopolymers, by high-pressure synchrotron X-ray diffraction
Author
Oh, Jae EunClark, Simon M.Monteiro, Paulo J. M.
Keywords
6-membered rings; Applied pressure; Building units; Equation of state; Geopolymer; Geopolymerization; High pressure; High temperature; Hydroxycancrinite; Hydroxysodalite; Low pressures; Synchrotron studies; Synchrotron x ray diffraction; Zeolitic materials
Issue Date
2011-11
Publisher
ELSEVIER SCI LTD
Citation
CEMENT & CONCRETE COMPOSITES, v.33, no.10, pp.1014 - 1019
Abstract
Crystalline zeolitic materials, such as hydroxycancrinite, hydroxysodalite, herschelite and nepheline, are often synthesized from geopolymerization using fly-ash and solutions of NaOH at high temperatures. Comprised mainly of 6-membered aluminosilicate rings that act as basic building units, their crystal structures may provide insight into the reaction products formed in NaOH-activated fly ash-based geopolymers. Recent research indicates that the hydroxycancrinite and hydroxysodalite may play an important role as possible analogues of zeolitic precursor in geopolymers. Herein is reported a high pressure synchrotron study of the behavior of hydroxycancrinite exposed to pressures up to 6.1 GPa in order to obtain its bulk modulus. A refined equation of state for hydroxycancrinite yielded a bulk modulus of K(o) = 46 +/- 5 GPa (assuming K'(o) = 4.0) for a broad range of applied pressure. When low pressure values are excluded from the fit and only the range of 2.5 and 6.1 GPa is considered, the bulk modulus of hydroxycancrinite was found to be K(o) = 46.9 +/- 0.9 GPa (K'(o) = 4.0 +/- 0.4, calculated). Comparison with the literature shows that all zeolitic materials possessing single 6-membered rings (i.e., hydroxycancrinite, sodalite and nepheline) have similar bulk moduli.
URI
Go to Link
DOI
10.1016/j.cemconcomp.2011.05.002
ISSN
0958-9465
Appears in Collections:
UEE_Journal Papers
Files in This Item:
000297188700004.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU